... ..........................GSM + Landline Auto-dial Home Security Alarm SystemModel: LS-GSM-100B LS-GSM-100B Alarm System Features: 1. Absolutely wireless alarm system, if intruder enter ... at the same time but still can work with one network only if you don't have both either ... parts in safe and efficient way.19. Various functions, such as remote control, system arming/disarming, monitoring and intercom ...